/* 返回顶部 start */
#back-to-top {
    position: fixed;
    bottom: 34.684px;
    right: 145.6px;
    width: 34.684px;
    height: 34.684px;
    border-radius: 50%;
    background-color: rgba(32, 28, 41, 0.86);
    color: #fff;
    text-align: center;
    line-height: 34.684px;
    z-index: 11;
    font-size: 9.724px;
    display: none;
    border: 2.756px solid rgba(32, 28, 41, 0.26);
    box-shadow: 0 0 20.8px rgba(16, 14, 23, 0.46);
    cursor: pointer;
    overflow: hidden;
}

#back-to-top .icon {
    width: 15.6px;
    height: 28.6px;
}

#back-to-top .flow {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 0;
    width: 100%;
    z-index: 12;
    background: rgba(32, 28, 41, 0.86);
}

#back-to-top .flow::before,
#back-to-top .flow::after {
    content: '';
    position: absolute;
    width: 277.316px;
    height: 277.316px;
    top: 0;
    left: 50%;
    background: #ffb3cc !important;
    background: linear-gradient(#f00, #f353a9) !important;
    opacity: 0.4;
    border-radius: 45%;
    transform: translate(-50%, -70%) rotate(0);
    animation: rotate 6s linear infinite;
    z-index: 10;
}

#back-to-top .flow::after {
    border-radius: 47%;
    background: #ffb3cc !important;
    background: linear-gradient(rgb(12, 11, 11), #f353a9) !important;
    opacity: 0.9;
    transform: translate(-50%, -70%) rotate(0);
    animation: rotate 10s linear -5s infinite;
    z-index: 20;
}

#back-to-top span {
    position: relative;
    top: 0;
    left: 0;
    width: 31px;
    text-align: center;
    line-height: 31px;
    font-weight: 900;
    z-index: 13;
}

#back-to-top #back2top-icon {
    display: none;
    font-size: 14px;
    transform: rotate(-45deg);
}

#back-to-top:hover .percentage {
    display: none;
}

#back-to-top:hover #back2top-icon {
    display: block;
}

@keyframes rotate {
    0% {
        transform: translate(-50%, 0) rotateZ(0deg);
    }

    50% {
        transform: translate(-50%, -2%) rotateZ(180deg);
    }

    100% {
        transform: translate(-50%, 0%) rotateZ(360deg);
    }
}

/* 返回顶部 end */
